unix_domain_socket_posix.h

// Copyright (c) 2009 The Chromium Authors. All rights reserved.// Use of this source code is governed by a BSD-style license that can be// found in the LICENSE file.#ifndef BASE_UNIX_DOMAIN_SOCKET_POSIX_H_#define BASE_UNIX_DOMAIN_SOCKET_POSIX_H_#include <stdint.h>#include <sys/types.h>#include <vector>class Pickle;
namespace base {
// Use sendmsg to write the given msg and include a vector// of file descriptors. Returns true iff successful.bool SendMsg(int fd, constvoid* msg, size_t length,
std::vector<int>& fds);
// Use recvmsg to read a message and an array of file descriptors. Returns// -1 on failure. Note: will read, at most, 16 descriptors.
ssize_t RecvMsg(int fd, void* msg, size_t length, std::vector<int>* fds);
// Perform a sendmsg/recvmsg pair.// 1. This process creates a UNIX DGRAM socketpair.// 2. This proces writes a request to |fd| with an SCM_RIGHTS control message// containing on end of the fresh socket pair.// 3. This process blocks reading from the other end of the fresh socketpair.// 4. The target process receives the request, processes it and writes the// reply to the end of the socketpair contained in the request.// 5. This process wakes up and continues.//// fd: descriptor to send the request on// reply: buffer for the reply// reply_len: size of |reply|// result_fd: (may be NULL) the file descriptor returned in the reply (if any)// request: the bytes to send in the request
ssize_t SendRecvMsg(int fd, uint8_t* reply, unsigned reply_len, int* result_fd,
const Pickle& request);
} // namespace base#endif // BASE_UNIX_DOMAIN_SOCKET_POSIX_H_